61 lines
807 B
Markdown
61 lines
807 B
Markdown
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## Instructions
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```
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stbu
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lwzu
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addx
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addix
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addic
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addzex
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subfx
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subfex
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subficx
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mulli
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mullwx
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divwux
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andix
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orx
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rlwinmx
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rldiclx
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extsbx
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slwx
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srawix
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# can be no-op
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dcbt
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dcbtst
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twi
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```
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## Codegen
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### Indirect branches (ctr/lr)
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emit_control.cc XeEmitBranchTo
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Need to take the value in LR/CTR and do something with it.
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Fast path:
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- Every time LR would be stashed, add the value of LR (some NIA) to a lookup
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table.
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- When doing an indirect branch first lookup the address in the table.
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- If not found, slow path, else jump.
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Slow path:
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- Call out and do an SDB lookup.
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- If found, return, add to lookup table, and jump.
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- If not found, need new function codegen!
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### Caching of register values in basic blocks
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Right now the SSA values seem to leak from the blocks somehow. All caching
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is disabled.
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```
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